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Chapter 8 Quiz
Return to Animal Physiology 4e Student Resources
Chapter 8 Quiz
Quiz Content
*
not completed
.
Which enzyme is required to convert fructose-6-phosphate to fructose-1,6-diphosphate?
Hexokinase
correct
incorrect
Phosphofructokinase
correct
incorrect
Glyceraldehyde-3-phosphate dehydrogenase
correct
incorrect
Pyruvate kinase
correct
incorrect
*
not completed
.
Which enzyme is required to use an ATP molecule during glycolysis?
Phosphoglycerate kinase
correct
incorrect
Glyceraldehyde-3-phosphate dehydrogenase
correct
incorrect
Pyruvate kinase
correct
incorrect
Phosphofructokinase
correct
incorrect
*
not completed
.
Which part of the cell would have a high level of activity when the lactic acid to pyruvic acid ratio increases?
Cytosol
correct
incorrect
Intermembrane space
correct
incorrect
Mitochondrial matrix
correct
incorrect
Inner membrane of the mitochondria
correct
incorrect
*
not completed
.
How many ATP molecules are produced from one glucose molecule during the Krebs Cycle?
One
correct
incorrect
Two
correct
incorrect
Three
correct
incorrect
Four
correct
incorrect
*
not completed
.
Which statement most accurately summarizes the chemiosmotic hypothesis?
Electrons are transferred along the electron transport chain and delivered to oxygen.
correct
incorrect
Hydrogen ions are pumped into the matrix to create an electrochemical gradient.
correct
incorrect
Protons move from low concentration to high concentration, creating unequal distribution across the inner mitochondrial membrane.
correct
incorrect
A phosphate group moves from ATP to another substrate.
correct
incorrect
*
not completed
.
What would happen to energy production if NADH and FADH
2
were not available?
Glycolysis would continue.
correct
incorrect
Oxygen would become unavailable.
correct
incorrect
The Krebs cycle would stop.
correct
incorrect
The electron transport chain would stop.
correct
incorrect
*
not completed
.
Protons are transferred back to the mitochondrial matrix via
succinate dehydrogenase.
correct
incorrect
cytochrome
b
-
c
1
.
correct
incorrect
cytochrome oxidase.
correct
incorrect
ATP synthase.
correct
incorrect
*
not completed
.
Which protein does
not
participate in proton movement?
Cytochrome
b
-
c
1
correct
incorrect
Cytochrome oxidase
correct
incorrect
ATP synthase
correct
incorrect
Succinate dehydrogenase
correct
incorrect
*
not completed
.
The pH in the intermembrane space is
acidic because of proton diffusion.
correct
incorrect
acidic because of proton pumping.
correct
incorrect
basic because of proton diffusion.
correct
incorrect
basic because of proton pumping.
correct
incorrect
*
not completed
.
Redox balance is the
removal of electrons from a compound as quickly as they are added.
correct
incorrect
removal of electrons from a compound without any addition of them.
correct
incorrect
loss of electrons.
correct
incorrect
gain of electrons.
correct
incorrect
*
not completed
.
Which statement about reactive oxygen species (ROS) is
false
?
They are an ordinary mechanism of aerobic metabolism.
correct
incorrect
They are generated in the mitochondria.
correct
incorrect
The enzyme catalase converts oxygen free radicals to hydrogen peroxide.
correct
incorrect
The damage they cause is called oxidative stress.
correct
incorrect
*
not completed
.
Suppose that the ratio of FADH to FADH
2
is 1. The molecule is said to be in
oxidative state.
correct
incorrect
reductive state.
correct
incorrect
redox balance.
correct
incorrect
oxygen deficiency.
correct
incorrect
*
not completed
.
The enzyme needed to convert pyruvic acid to lactic acid is called
hexokinase.
correct
incorrect
phosphofructokinase.
correct
incorrect
catalase.
correct
incorrect
lactate dehydrogenase.
correct
incorrect
*
not completed
.
During anaerobic glycolysis, only about ______ of free energy from glucose is released.
5%
correct
incorrect
7%
correct
incorrect
10%
correct
incorrect
15%
correct
incorrect
*
not completed
.
Which molecule is generated during pyruvate oxidation?
CO
2
correct
incorrect
H
2
O
correct
incorrect
ATP
correct
incorrect
Lactic acid
correct
incorrect
*
not completed
.
In vertebrate muscle, how is the supply of NAD regenerated in the absence of oxygen?
Using the Krebs cycle
correct
incorrect
By forming pyruvate
correct
incorrect
By breathing faster
correct
incorrect
By forming lactic acid
correct
incorrect
*
not completed
.
Which molecule, found in skeletal muscles of vertebrates, stores oxygen?
Myoglobin
correct
incorrect
Hemoglobin
correct
incorrect
ATP
correct
incorrect
Ubiquinone
correct
incorrect
*
not completed
.
In the term "slow oxidative," used to describe muscle fibers, "slow" refers to
the length of time it takes for the muscle to contract.
correct
incorrect
the type of energy to be used.
correct
incorrect
their low resistance to fatigue.
correct
incorrect
the type of physical activity to be performed.
correct
incorrect
*
not completed
.
During long term muscle activity, peak fuel usage occurs in which order?
Muscle glucose; muscle glycogen; phosphagens; glycogen brought in by the circulation
correct
incorrect
Phosphagens; muscle glucose; glycogen brought in by the circulation; muscle glycogen
correct
incorrect
Phosphagens; muscle glucose; muscle glycogen; glucose brought in by the circulation
correct
incorrect
Muscle glucose; phosphagens; muscle glycogen; glycogen brought in by the circulation
correct
incorrect
*
not completed
.
In hypoxia,
ATP is being used.
correct
incorrect
ATP is being depleted.
correct
incorrect
there is a lack of oxygen.
correct
incorrect
there is a lack of lactate dehydrogenase.
correct
incorrect
*
not completed
.
The maintenance of a steady rate of oxygen consumption, regardless of the level of oxygen in the environment, is called oxygen
regulation.
correct
incorrect
deficit.
correct
incorrect
conformity.
correct
incorrect
steady state.
correct
incorrect
*
not completed
.
The metabolic by-product of anaerobic glycolysis that fish excrete across their gills is
lactic acid.
correct
incorrect
ethanol.
correct
incorrect
pyruvic acid.
correct
incorrect
succinic acid.
correct
incorrect
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